Specifications:Material: Tungsten Carbide Groove: Double Cut Solid Cutting edge diameter: Approx. 12mm Shank diameter: Approx. 1/4"(6mm) Total length: 58-65mm Features: Processing all kinds of metal(including all sorts of hardened steel) and non-metal (such as marble, jade, bone). Machining hardness reach ≥HRA85. For the most work it can be replaced with small grinding wheel,and no dust pollution. High efficiency, high-quality finish, long service life, good economic returns. Easy to use, safe and reliable, can reduce labor intensity. Mechanical parts chamfering, rounding and groove processing. Dual Chamber is crossover lines, not easy to block the lines, more suitable for the object of relatively low density material. Uses: Cleaning trimming,veining and weld joint of casting, forging and weldment. Finishing all kinds of metal molds. Impeller passage of finishing processing. A variety of mechanical parts chamfer,round and groove processing. Inner hole surface of machinery parts finishing. The process of various metal and nonmetal sculpture.Package Includes: 5Pcs of Carbide Rotary Burrs.